SIST EN 300 949 V7.1.1:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.NUPLOMHQMDDigital cellular telecommunications system (Phase 2+) (GSM); Broadcast Call Control (BCC) protocol (GSM 04.69 version 7.1.1 Release 1998)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 300 949 Version 7.1.1SIST EN 300 949 V7.1.1:2003en01-december-2003SIST EN 300 949 V7.1.1:2003SLOVENSKI
STANDARD



SIST EN 300 949 V7.1.1:2003



ETSIEN300949V7.1.1(2000-04)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);BroadcastCallControl(BCC)protocol(GSM04.69version7.1.1Release1998)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 300 949 V7.1.1:2003



ETSIETSIEN300949V7.1.1(2000-04)2(GSM04.69version7.1.1Release1998)ReferenceREN/SMG-030469Q7R1KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM)ETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:+33492944200Fax:+33493654716SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:editor@etsi.frCopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 300 949 V7.1.1:2003



ETSIETSIEN300949V7.1.1(2000-04)3(GSM04.69version7.1.1Release1998)ContentsIntellectualPropertyRights.5Foreword.51Scope.62References.63Definitionsandabbreviations.63.1Definitions.63.2Abbreviations.74Applicability.75Mainconcepts.76ElementaryproceduresforBroadcastCallControl.86.1Overview.86.1.1General.86.1.2Broadcastcallcontrolstates.86.1.2.1BroadcastcallcontrolstatesattheMSsideoftheinterface.86.1.2.1.1AttributesandParametersofBCCintheMS.86.1.2.1.2NULL(U0).96.1.2.1.3MMCONNECTIONPENDING(U0.p).96.1.2.1.4BROADCASTCALLINITIATED(U1).96.1.2.1.5BROADCASTCALLACTIVE(U2).96.1.2.1.6BROADCASTCALLPRESENT(U3).96.1.2.1.7BROADCASTCALLCONNECTIONREQUESTED(U4).96.1.2.1.8TERMINATIONREQUESTED(U5).96.1.2.1.9RECEIVEMODEACTIVE(U6).96.1.2.1.10BCCTIMERSINTHEMS.106.1.2.1.11CONSISTENCYOFPARAMETERSANDSTATES.106.1.2.2BROADCASTCALLCONTROLSTATESATTHENETWORKSIDEOFTHEINTERFACE.106.1.2.2.1NULL(StateN0).106.1.2.2.2BROADCASTCALLINITIATED(N1).106.1.2.2.3BROADCASTCALLACTIVE(N2).116.1.2.2.4BROADCASTCALLESTABLISHMENTPROCEEDING(N3).116.1.2.2.5TERMINATIONREQUESTED(N4).116.2Proceduresforestablishmentofabroadcastcall.116.2.1Activationofabroadcastcallbythenetwork.116.2.2Mobileoriginatedestablishment.116.2.2.1Terminationduringmobileoriginatedestablishment.126.2.2.2Abnormalcases.126.2.3MobileterminatingbroadcastcallestablishmentintheMS.126.3Proceduresduringtheactivestateandreceivemodeactivestateofabroadcastcall.126.3.1Mobilestationproceduresintheactivestate.126.3.2Networkproceduresintheactivestate.136.3.3MobilestationproceduresintheRECEIVEMODEACTIVEstate.136.4Proceduresforrelease,abortion,andterminationofabroadcastcall.136.4.1Terminationprocedure.136.4.2Abortandreleaseprocedures.146.5Miscellaneousprocedures.146.5.1Statusprocedures.146.5.1.1Getstatusprocedure.146.5.1.2Setparameterprocedure.147Handlingofunknown,unforeseen,anderroneousprotocoldata.147.1General.147.2Messagetooshort.157.3Unknownorunforeseentransactionidentifier.15SIST EN 300 949 V7.1.1:2003



ETSIETSIEN300949V7.1.1(2000-04)4(GSM04.69version7.1.1Release1998)7.4Unknownorunforeseenmessagetype.157.5Non-semanticalmandatoryinformationelementerrors.157.6Unknownandunforeseeninformationelementsinthenon-imperativemessagepart.167.6.1Informationelementsunknowninthemessage.167.6.2Outofsequenceinformationelements.167.6.3RepeatedInformationelements.167.7Non-imperativemessageparterrors.167.7.1SyntacticallyincorrectoptionalInformationelements.167.8Messageswithsemanticallyincorrectcontents.168Messagefunctionaldefinitionsandcontents.168.1CONNECT.178.2GETSTATUS.188.2.1mobileidentity.188.3IMMEDIATESETUP.188.3.1Mobileidentity.198.4SETPARAMETER.198.5SETUP.198.6STATUS.208.6.1Callstate.208.6.2Stateattributes.208.7TERMINATION.218.8TERMINATIONREJECT.218.9TERMINATIONREQUEST.219Contentsofinformationelementsvalueparts.229.1ProtocolDiscriminator.229.2Transactionidentifier.229.3MessageType.229.4Otherinformationelements.229.4.1CallReference.239.4.2Callstate.239.4.3Cause.249.4.4Originatorindication.259.4.5SpareHalfOctet.269.4.6Stateattributes.26AnnexA(Informative):ChangeRequestHistory.27History.28SIST EN 300 949 V7.1.1:2003



ETSIETSIEN300949V7.1.1(2000-04)5(GSM04.69version7.1.1Release1998)IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinSR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinSR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbytheSpecialMobileGroup(SMG).ThepresentdocumentspecifiestheBroadcastCallControl(BCC)protocolwithinthedigitalcellulartelecommunicationssystem(Phase2+).ThecontentsofthepresentdocumentissubjecttocontinuingworkwithinSMGandmaychangefollowingformalSMGapproval.ShouldSMGmodifythecontentsofthepresentdocumentitwillbere-releasedwithanidentifyingchangeofreleasedateandanincreaseinversionnumberasfollows:Version7.x.ywhere:7indicatesRelease1998ofGSMPhase2+.xtheseconddigitisincrementedforallchangesofsubstance,i.e.technicalenhancements,corrections,updates,etc.ythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.NationaltranspositiondatesDateofadoptionofthisEN:31March2000DateoflatestannouncementofthisEN(doa):30June2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31December2000DateofwithdrawalofanyconflictingNationalStandard(dow):31December2000SIST EN 300 949 V7.1.1:2003



ETSIETSIEN300949V7.1.1(2000-04)6(GSM04.69version7.1.1Release1998)1ScopeThepresentdocumentspecifiestheBroadcastCallControl(BCC)protocolusedbytheVoiceBroadcastCallService(VBCS)ontheradiointerface.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.• ForthisRelease1998document,referencestoGSMdocumentsareforRelease1998versions(version7.x.y).[1]GSM01.04:"Digitalcellulartelecommunicationssystem(Phase2+);Abbreviationsandacronyms".[2]GSM02.69):"Digitalcellulartelecommunicationssystem(Phase2+);VoiceBroadcastCallService(VBCS)stage1".[3]GSM03.03:"Digitalcellulartelecommunicationssystem(Phase2+);Numbering,addressingandidentification".[4]GSM03.67:"Digitalcellulartelecommunicationssystem(Phase2+);enhancedMulti-LevelPrecedenceandPre-emptionservice(eMLPP)-Stage2".[5]GSM03.69:"Digitalcellulartelecommunicationssystem(Phase2+);VoiceBroadcastCallService(VBCS)stage2".[6]GSM04.06:"Digitalcellulartelecommunicationssystem(Phase2+);MobileStation-BaseStationSystem(MS-BSS)interfaceDataLink(DL)layerspecification".[7]GSM04.07:"Digitalcellulartelecommunicationssystem(Phase2+);Mobileradiointerfacesignallinglayer3Generalaspects".[8]GSM04.08:"Digitalcellulartelecommunicationssystem(Phase2+);Mobileradiointerfacelayer3specification".3Definitionsandabbreviations3.1DefinitionsDefinitionsusedinthepresentdocumentarealsodefinedinGSM02.69.Forthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply.Attachmentoftheuserconnection:SeeGSM04.08,subclause5.2.Broadcastcallchannel:Downlinkchanneltobeallocatedineachcellofthegroupcallareaforaparticularbroadcastcall.AllMSsofthelisteningservicesubscribersinonecellshalllistentothecommondownlink.SIST EN 300 949 V7.1.1:2003



ETSIETSIEN300949V7.1.1(2000-04)7(GSM04.69version7.1.1Release1998)Broadcastcall:Isusedinthesamesenseas"voicebroadcastcall".Callinguser:BCCentityintheMobileStation(MS)initiatingorhavinginitiatedabroadcastcall.Clearingthecontextrelatedtothebroadcastcallestablishment:allrunningBCCtimersintherelevantBCCentityarestopped,allattributesintherelevantBCCentityaredeleted.Downlink:NetworktoMSdirection.Groupreceivemode:SeeGSM04.08.Originatingmobilestation:MSinitiatingorhavinginitiatedthebroadcastcall.Uplink:Mobilestationtonetworkdirection.3.2AbbreviationsAbbreviationsusedinthepresentdocumentarealsolistedinGSM01.04.Forthepurposesofthepresentdocument,thefollowingabbreviationapplies:BCCBroadcastCallControl.4ApplicabilitySupportofthebroadcastcallprotocolisoptionalintheMSandinthenetwork.5MainconceptsThepresentdocumentdescribesthebroadcastcallcontrol(BCC)protocol,whichisoneoftheprotocolsoftheConnectionManagement(CM)sublayer(seeGSM04.07).ThereisingeneralmorethanoneMSengagedinabroadcastcall.Consequently,thereisingeneralmorethanoneMSwithaBCCentityengagedinthesamebroadcastcall,andthereisoneBCCentityinthenetworkengagedinthatbroadcastcall.UnderwhichconditionsaBCCmessageispassedfromlower(sub-)layerstotheBCCentityisdefinedinthespecificationsofthesub-layers.TheMSshallignoreBCCmessagesthatitreceiveswhichweresentinunacknowledgedmodeandwhichexplicitlyspecifyasdestinationamobileidentitywhichisnotamobileidentityoftheMS.HigherlayersandtheMMsub-layerdecidewhentoacceptparallelBCCtransactionsandwhen/whethertoacceptBCCtransactionsinparalleltootherCMtransactions.Thebroadcastcallmaybeinitiatedbyamobileuserorbyadispatcher.Specificationofaprotocolfordispatchersisoutofthescopeofthepresentdocument.Hence,inthescopeofthepresentdocument,thereare-oneBCCentityinthenetwork;and-oneormorethanoneBCCentitiesindifferentMSsengagedinabroadcastcall,andoneorenoneoftheMSsistheoriginatorofthebroadcastcall(calledtheoriginatingMSinthisETS).NOTE:WhereasfortheGroupCallControl(GCC)protocol(seeGSM04.68),incertainsituations,theGCCentityinaMSassumestobetheoriginatorofabroadcastcallwithoutbeingtheoriginator,thisisnotthecasefortheBCCprotocol.SIST EN 300 949 V7.1.1:2003



ETSIETSIEN300949V7.1.1(2000-04)8(GSM04.69version7.1.1Release1998)TheoriginatoroftheBCCtransactionchoosestheTransactionIdentifier(TI).AMSnotassumingtobetheoriginatorofthetransactionwillchosethetransactionidentifierreceivedfromthenetwork,settingtheTIflagto1+xmod2wherexisthereceivedTIflag.ThisETSdescribesthebroadcastcallcontrolprotocolonlywithregardtotwopeerentities,oneinaMS,theotheroneinthenetwork.Thecallcontrolentitiesaredescribedascommunicatingfinitestatemachineswhichexchangemessagesacrosstheradiointerfaceandcommunicateinternallywithotherprotocol(sub)layers.Inparticular,theBCCprotocolusestheMMandRRsublayerspecifiedinGSM04.08.TheBCCentityinaMSthatisnottheoriginatorofthebroadcastcallshallnotsendmessagestoitspeerentity.Thisdescriptioninonlynormativeasfarastheconsequentialexternallyobservablebehaviourisconcerned.Forsimplicity,insteadofusingtheterms"BCCentityintheMS"and"BCCentityinthenetwork",thepresentdocumentoftenusestheterms"MS"and"network"ifnoconfusionmayarise.Certainsequencesofactionsofthetwopeerentitiescompose"elementaryprocedures"whichareusedasabasisforthedescriptioninthepresentdocument.Theseelementaryproceduresaredefinedinclause6.ThenetworkshouldapplysupervisoryfunctionstoverifythattheBCCproceduresareprogressingandifnot,takeappropriatemeanstoresolvetheproblems.This,however,isoutofthescopeofthepresentdocument.6ElementaryproceduresforBroadcastCallControl6.1Overview6.1.1GeneralTheelementaryproceduresmaybebroadcastedintothefollowingclasses:-broadcastcallestablishmentprocedures;-broadcastcallterminationprocedures;-broadcastcallinformationphaseprocedures;-miscellaneousprocedures.6.1.2Broadcastcallcontrolstates6.1.2.1BroadcastcallcontrolstatesattheMSsideoftheinterfaceTheBCCentityoftheMSisdescribedasanextendedfinitestatemachine.Itperformstransitionsbetweenstates.Ithascertainparametersandattributes,e.g.configurationparametersandbehaviourparameters,whichitsetsandchangesbasedoninteractionwithhigherandlower(sub-)layersandonmessageexchangewithitspeerentity.Ifaconfigurationparameterissettoacertainvalue,theMSshallalsoadapttheconfigurationaccordingly.Behaviourparametersdecideon(partof)thebehaviouroftheBCCentity.WhentheBCCentityintheMSreceivesamessage,itshallfirstanalysewhetheritshallignorethemessage,seeclauses5and7.6.1.2.1.1AttributesandParametersofBCCintheMSForthefollowingbehaviourparameters,thedescriptionisinformative.ParameterDescriptionORIGDependingonthecontext,theMSassumestobetheoriginatorofthecall(ORIG=T)ornottobetheoriginatorofthecall(ORIG=F).COMMDependingonthecontext,theMSassumesthatcommunicationwithitspeerentityisenabledinbothdirections(COMM=T)ornot(COMM=F).ForthefollowingconfigurationparameterstheMSshalladaptitsconfigurationaccordingtotheparametervalueandparameterdefinition.SIST EN 300 949 V7.1.1:2003



ETSIETSIEN300949V7.1.1(2000-04)9(GSM04.69version7.1.1Release1998)ParameterDefinitionD-ATTD-ATT=TmeansthattheMSattachestheuserconnectionforthebroadcastcallinthedownlink.D-ATT=FmeansthattheMSdoesnotattachtheuserconnectionforthebroadcastcallinthedownlink.U-ATTU-ATT=TmeansthattheMSattachestheuserconnectionforthebroadcastcallintheuplink.U-ATT=FmeansthattheMSdoesnotattachtheuserconnectionforthebroadcastcallintheuplink.6.1.2.1.2NULL(U0)NobroadcastcallexistsfortheBCCentity.Whenenteringthestate,parametersshallbesettothefollowingvalues,andconfigurationshallbeadaptedtothenewvaluesofconfigurationparameters:ORIG=F,COMM=F,D-ATT=F,U-ATT=F.6.1.2.1.3MMCONNECTIONPENDING(U0.p)TheBCCentityhasrequestedtheexplicitestablishmentofanMMconnection.Whenenteringthestate,parametersshallbesettothefollowingvalues,andconfigurationshallbeadaptedtothenewvaluesofconfigurationparameters:ORIG=T,COMM=F,D-ATT=F,U-ATT=F.6.1.2.1.4BROADCASTCALLINITIATED(U1)TheBCCentityhasrequestedthepeerentityinthenetworktoestablishabroadcastcall.Whenenteringthestate,parametersshallbesettothefollowingvalues,andconfigurationshallbeadaptedtothenewvaluesofconfigurationparameters:ORIG=T,COMM=T,D-ATT=F,U-ATT=F.6.1.2.1.5BROADCASTCALLACTIVE(U2)Thebroadcastcallisestablishedatleastinonecell.Whenenteringthestate,parametersshallbesettothefollowingvalues,andconfigurationshallbeadaptedtothenewvaluesofconfigurationparameters:ORIG=T,COMM=T,D-ATT=T,U-ATT=T.6.1.2.1.6BROADCASTCALLPRESENT(U3)TheMShasreceivedanotificationaboutanongoingbroadcastcall.Higherlayersarerequestedtoacceptorrejectthecall.Whenenteringthestate,parametersshallbesettothefollowingvalues,andconfigurationshallbeadaptedtothenewvaluesofconfigurationparameters:ORIG=F,COMM=F,D-ATT=F,U-ATT=F.6.1.2.1.7BROADCASTCALLCONNECTIONREQUESTED(U4)TheMShasreceivedanotificationaboutanongoingbroadcastcall.Higherlayershavedecidedtoacceptthecall.Whenenteringthestate,parametersshallbesettothefollowingvalues,andconfigurationshallbeadaptedtothenewvaluesofconfigurationparameters:ORIG=F,COMM=F,D-ATT=F,U-ATT=F.6.1.2.1.8TERMINATIONREQUESTED(U5)TheMSwhichistheoriginatorofthebroadcastcallhasbeeninstateU1orU2andhassentaTERMINATIONREQUESTmessagetothenetwork.Whenenteringthestate,parametersshallbesettothefollowingvalues,andconfigurationshallbeadaptedtothenewvaluesofconfigurationparameters:ORIG=T,COMM=T,D-ATT=T,U-ATT=T.6.1.2.1.9RECEIVEMODEACTIVE(U6)TheBCCentityintheMSinstateU4,BROADCASTCALLCONNECTIONREQUESTED,hasgotanindicationfromlower(sub-)layersthatRRhasenteredgroupreceivemode(seeGSM04.08).Whenenteringthestate,parametersshallbesettothefollowingvalues,andconfigurationshallbeadaptedtothenewvaluesofconfigurationparameters:ORIG=F,COMM=F,D-ATT=T,U-ATT=F.SIST EN 300 949 V7.1.1:2003



ETSIETSIEN300949V7.1.1(2000-04)10(GSM04.69version7.1.1Release1998)6.1.2.1.10BCCTIMERSINTHEMSTable6.1specifiesthetimersusedinBCC.Thedenotationofcolumnsisdefinedasfollows:timer::=nameofthetimer;set::=underwhichconditionsthetimerisset(i.e.,started);stopped::=underwhichconditionsthetimerisstopped;runninginstate(s)::=inwhichstate(s)thetimermayberunning;actionatexpiry::=whichactionstheBCCentityshallperformatexpiry;value::=thedurationbetweensettingthetimerandexpiryofthetimer("s"denotes"second(s)""xx-yy"meansthatanyvaluebetweenxxandyyispermitted).Table6.1:SpecificationoftimersusedinBCCtimersetstoppedrunninginstate(s)actionatexpiryvalueTnochannelinstateU6onreceiptofanindicationfromlower(sub-)layersthatnochanneliscurrentlyavailablewhenleavingU6orwhenreceivinginU6anindicationfromlower(sub-)layersthatachannelisavailableinU6,dependingonfurtherconditionsseesubclause6.3.13sTMM-estwhenenteringU0.pusingtheset-upprocedurewhenenteringU1usingtheimmediateset-upprocedurewhenleavingU0.porU1U0.p,U1seesubclause6.2.15sTtermwhensendingaTERMINATIONREQUESTwhenreceivingaTERMINATIONorTERMINATIONREJECTU5abortbroadcastcall10sTconnreqwhenenteringstateU4whenleavingstateU4U4abortbroadcastcall10-30s6.1.2.1.11CONSISTENCYOFPARAMETERSANDSTATESTheMSshallconsiderthefollowingparametervaluesasinconsistentwiththestateorsub-state:ORIG=TisinconsistentwithstatesU3,U4,andU6.COMM=TisinconsistentwithstatesU0,U3,U4,andU6.AllothervaluesofparametersORIG,COMM,D-ATT,andU-ATTshallnotbeconsideredbytheMSasinconsistentwithastate.6.1.2.2BROADCASTCALLCONTROLSTATESATTHENETWORKSIDEOFTHEINTERFACE6.1.2.2.1NULL(StateN0)NobroadcastcallexistsfortheBCCentity.6.1.2.2.2BROADCASTCALLINITIATED(N1)TheBCCentityhasreceivedtheindicationthatapeerentityinaMSwantstoestablishabroadcastcallforacertainbroadcastidentity.SIST EN 300 949 V7.1.1:2003



ETSIETSIEN300949V7.1.1(2000-04)11(GSM04.69version7.1.1Release1998)6.1.2.2.3BROADCASTCALLACTIVE(N2)Thebroadcastcallisestablishedinatleastonecell;theremaybeaMSwhichhasseizedtheuplinkornot;theremaybetalkingdispatchersornot.6.1.2.2.4BROADCASTCALLESTABLISHMENTPROCEEDING(N3)TheBCCentitywantstoacceptthebroadcastcall,hasinitiatedestablishmentofcorrespondingbroadcastcallchannels,and,ifthereisacallinguser.hassentaCONNECTmessagetothecallinguser.6.1.2.2.5TERMINATIONREQUESTED(N4)TheBCCentityhasaskedlowersub-layerstoterminatethebroadcastcallinallcellsandwaitsforaconfirmationthatthebroadcastcallhasbeenterminatedinallcells.6.2Proceduresforestablishmentofabroadcastcall6.2.1ActivationofabroadcastcallbythenetworkTheBCCentityinthenetworkmayinitiatetheactivationofabroadcastcallwithacertainbroadcastcallreferenceandpriorityinalistofcellsbyaskinglowerlayerstoestablishthebroadcastcallwiththatbroadcastcallreferenceandpriorityinthosecells.Itthenwaitsuntilitisinformedbylower(sub-)layersthatresourceactivationwassufficientlysuccessful,andentersstateN2,BCACTIVE,6.2.2MobileoriginatedestablishmentHigherlayersintheMSmayasktheBCCentityinstateU0,NULL,toestablishabroadcastcall,eitherusingtheimmediateset-upprocedureorusingtheset-upprocedure.Therequestcontainsagroup-idandmaycontainapriorityindication.Onrequestofhigherlayerstoestablishabroadcastcallusingtheset-upprocedure,theBCCentityoftheMSbuildsanappropriateSETUPmessageandaskslower(sub-)layerstoestablishanMMconnectionexplicitly(i.e.byuseofaCMSERVICEREQUESTmessage)andtotransmittheSETUPmessage.ItthenentersstateU0.p,MMCONNECTIONPENDING.InstateU0.p,wheninformedbylowersub-layersthatanMMconnectionhasbeenestablished,theBCCentityintheMSshallstoptimerTMM-estandenterstateU1,BCINITIATED.Onrequestofhigherlayerstoestablishabroadcastcallusingtheimmediateset-upproc
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